/* $Id: pdfa_extension_schema.java,v 1.4 2008/01/17 14:21:42 katja Exp $
 * PDF/A extension schema:
 * Demonstrate the use of an XMP extension schema as defined in PDF/A-1
 * 
 * Create a PDF/A document and use the "metadata" option of begin_document() to
 * supply an XMP file containing an XMP extension schema.
 *
 * Required software: PDFlib/PDFlib+PDI/PPS 7.0.3
 * Required data: XMP file
 */
package com.pdflib.cookbook.pdflib.pdf_flavors;

import com.pdflib.pdflib;
import com.pdflib.PDFlibException;

public class pdfa_extension_schema
{
    public static void main (String argv[])
    {
    /* This is where the data files are. Adjust as necessary. */
    String searchpath = "../input";
    String outfile = "pdfa_extension_schema.pdf";
    String title = "PDF/A Extension Schema";

    pdflib p = null;
    
    /* Required minimum PDFlib version */
    final double requiredversion = 703;
    final String requiredvstr = "7.0.3";
    
    String xmpfile = "machine_extension_schema_1.xmp";
    int font;

    try {
        p = new pdflib();

        p.set_parameter("SearchPath", searchpath);

        /* This means we must check return values of load_font() etc. */
        p.set_parameter("errorpolicy", "return");
        
        /* Check whether the required minimum PDFlib version is available */
        double major = p.get_value("major", 0); 
        double minor = p.get_value("minor", 0);
        double revision = p.get_value("revision", 0);
               
        if (major*100 + minor*10 + revision < requiredversion) 
            throw new Exception("Error: PDFlib " + requiredvstr + 
                " or above is required");

        /* Start a PDF/A document with an XMP file supplied, containing an XMP
         * extension schema. The XMP metadata will be read from the file and
         * embedded in the document. PDFlib will merge several internally
         * generated entries into the user-supplied XMP, e.g. xmp:CreateDate. 
         */
        if (p.begin_document(outfile, 
            "pdfa=PDF/A-1b:2005 metadata={filename=" + xmpfile + "}") == -1)
            throw new Exception("Error: " + p.get_errmsg());

        p.set_info("Creator", "PDFlib Cookbook");
        p.set_info("Title", title + " $Revision: 1.4 $");

        p.begin_page_ext(0, 0, "width=a4.height height=a4.width");

        /* Font embedding is required for PDF/A */
        font = p.load_font("LuciduxSans-Oblique", "unicode", "embedding");

        if (font == -1)
            throw new Exception("Error: " + p.get_errmsg());

        p.setfont(font, 12);

        p.fit_textline("An XMP extension schema is read from an XMP file and " +
        	 "the XMP metadata is embedded in the document.", 50, 400, "");

        p.end_page_ext("");

        p.end_document("");

        } catch (PDFlibException e) {
            System.err.print("PDFlib exception occurred:\n");
            System.err.print("[" + e.get_errnum() + "] " + e.get_apiname() +
                ": " + e.get_errmsg() + "\n");
        } catch (Exception e) {
            System.err.println(e.getMessage());
        } finally {
            if (p != null) {
                p.delete();
            }
        }
    }
}